Add support for randomising colours

src/main.c

@@ -5,6 +5,7 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
+#include <time.h>
 
 enum {
   TINY_EXIT_SUCCESS,
@@ -20,6 +21,8 @@ int main(void) {
     return TINY_EXIT_ARENA_INIT_FAILED;
   }
 
+  srand(time(NULL));
+
   Colour bg = {.r = 42, .g = 45, .b = 52, .a = 255};
   Colour teal = {.r = 14, .g = 156, .b = 208, .a = 255};
   Colour orange = {.r = 242, .g = 100, .b = 48, .a = 255};
@@ -34,8 +37,8 @@ int main(void) {
   }
 
   clear_image(&img, bg);
-  render_model(&model, &img, teal, RENDER_TYPE_FILLED);
-  render_model(&model, &img, orange, RENDER_TYPE_WIREFRAME);
+  render_model(&model, &img, teal, RENDER_TYPE_FILLED, COLOUR_TYPE_RANDOM);
+  render_model(&model, &img, orange, RENDER_TYPE_WIREFRAME, COLOUR_TYPE_FIXED);
   save_image(&img, "result.pam");
 
   wapp_mem_arena_destroy(&arena);